Hahn first came to Pawnee in Season 4 as Jennifer, the tough-as-nails campaign manager of Leslie's opponent, Bobby Newport (Paul Rudd). She went on to offer Ben (Adam Scott) a position on a congressional campaign in Washington, D.C.

"She's in two scenes," executive producer Mike Schur tells TVGuide.com. "She came in and did this scene that's kind of a big scene in the episode. Almost the entire performance that we used from her is from one take, which might not sound that amazing, but it's kind of amazing."

Could she be part of the surprise ending that Schur also teased? We'll find out Thursday when Parks and Recreation returns for its 100th episode at 8:30/7:30c on NBC. Are you excited for Hahn's return?